Mild Steel Box Section 7.5m – S235 Square Hollow Section
Mild Steel Box Section 7.5m – S235 Square Hollow Section
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Our S235 mild steel box section is supplied in full 7.5m lengths, in square sizes from 20x20mm up to 150x150mm and wall thicknesses from 2mm to 6mm. A strong, versatile square hollow section ideal for frames, gates, supports, trailers and general fabrication, with a 3-5 working day lead time to mainland UK.
Technical Specification
| Material | S235 mild steel |
| Profile | Square box section (SHS) |
| Length | 7.5m (full length) |
| Sizes available | 20x20mm up to 150x150mm |
| Wall thicknesses | 2mm - 6mm (size dependent) |
| Finish | Standard mill finish |
| Weldability | Weldable, drillable and easily fabricated |
| Density | 7,850 kg/m3 |
| Lead time | 3-5 working days (kerbside, mainland UK) |
Common Uses
Mild steel box section is widely used for gates, railings, fencing, structural frames, support posts, shelving, trailers, balustrades, agricultural buildings, workshop fabrication and general construction. Its equal sides and hollow profile give strength and rigidity while being easier to handle and fabricate than solid bar.
Box Section vs Rectangular Hollow Section
Square box section (SHS) has equal sides and is the most popular profile for general frames, gates and fabrication. Rectangular hollow section (RHS) has unequal sides, offering greater strength in one direction for beams and load-bearing spans. Choose box section for even strength and general framework.
Finish and Protection
Supplied in standard mill finish. The surface may show normal mill scale, handling marks or light surface oxidation, typical for untreated steel. For outdoor or moisture-exposed use, clean, prime and protect with a suitable paint or coating system.
Cutting and Fabrication
S235 box section can be cut, drilled, welded and fabricated using suitable metalworking tools. Cut ends and drilled holes should be protected if used outside or in damp conditions. Always use suitable protective equipment when working steel.
Delivery Information
Lead times are currently 3-5 working days. Delivery is kerbside only and our vehicles do not carry HIAB or lifting equipment - steel must be safely offloaded by the customer on arrival. Sections are supplied in full 7.5m lengths, so suitable delivery access is required.

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FREQUENTLY ASKED QUESTIONS
What size box section is available in 7.5m?
Our 7.5m mild steel box section is available in square sizes from 20x20mm up to 150x150mm, in wall thicknesses from 2mm to 6mm depending on the size. All sections are supplied in full 7.5m lengths in S235 mild steel.
What grade is your box section?
Our box section is supplied in S235 mild steel, a commonly specified general-purpose structural grade suitable for welding, cutting, drilling and fabrication. For exact section properties and tolerances, refer to the applicable mill certificate or BS EN standard for your application.
What is the difference between box section and rectangular hollow section?
Box section (SHS, square hollow section) has equal sides and is the most popular profile for frames, gates and general fabrication. Rectangular hollow section (RHS) has unequal sides, giving greater strength in one direction for beams and load-bearing spans. Choose box section for general framework and even strength.
Should I choose 3m or 7.5m box section?
7.5m lengths suit trade, fabrication and structural projects where fewer joints are an advantage. For smaller DIY projects or easier handling and delivery, our 3m box section lengths may be more practical. Both are supplied in the same S235 mild steel.
How is box section delivered?
Lead times are currently 3-5 working days. Sections are supplied in full 7.5m lengths, so suitable delivery access is required. Delivery is kerbside only and our vehicles do not carry HIAB or lifting equipment - steel must be safely offloaded by the customer on arrival.
MONEY BACK GUARANTEE
Here at Rackerman, we take customer satisfaction very seriously. If you are unsatisfied with the quality of your product, please email us info@rackerman.co.uk or give us a call: 01665 497513 and we will make it right.
SHIPPING
It should take no longer than 1-2 business day to process your order, then 3-5 working days (5-10 working days on RSJs + Chippings) to then receive your order from us after dispatch.
If you haven't received your items in this time frame, please contact us.
RETURNS
If you are unsatisfied with your purchase, that's completely fine! We offer a 30 day money back guarantee to all customers, no questions asked! Please contact us to arrange a return.
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